Xiao Yejun, Sun Qi, Leng Jing, Jin Shengye
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
J Phys Chem Lett. 2024 Mar 28;15(12):3390-3403. doi: 10.1021/acs.jpclett.4c00296. Epub 2024 Mar 19.
Photoresponsive MOFs with precise and adjustable reticular structures are attractive for light conversion applications. Uncovering the photoinduced carrier dynamics lays the essential foundation for the further development and optimization of the MOF material. With the application of time-resolved spectroscopy, photophysical processes including excimer formation, energy transfer/migration, and charge transfer/separation have been widely investigated. However, the identification of distinct photophysical processes in real experimental MOF spectra still remains difficult due to the spectral and dynamic complexity of MOFs. In this Perspective, we summarize the typical spectral features of these photophysical processes and the related analysis methods for dynamic studies performed by time-resolved photoluminescence (TR-PL) and transient absorption (TA) spectroscopy. Based on the recent understanding of excited-state properties of photoresponsive MOFs and the discussion of challenges and future outlooks, this Perspective aims to provide convenience for MOF kinetic analysis and contribute to the further development of photoresponsive MOF material.
具有精确且可调节网状结构的光响应性金属有机框架材料在光转换应用中颇具吸引力。揭示光致载流子动力学为金属有机框架材料的进一步发展和优化奠定了重要基础。随着时间分辨光谱技术的应用，包括准分子形成、能量转移/迁移以及电荷转移/分离等光物理过程已得到广泛研究。然而，由于金属有机框架材料的光谱和动力学复杂性，在实际实验的金属有机框架光谱中识别不同的光物理过程仍然困难重重。在此观点文章中，我们总结了这些光物理过程的典型光谱特征以及通过时间分辨光致发光（TR-PL）和瞬态吸收（TA）光谱进行动态研究的相关分析方法。基于对光响应性金属有机框架材料激发态性质的最新认识以及对挑战和未来展望进行的讨论，本观点文章旨在为金属有机框架材料的动力学分析提供便利，并推动光响应性金属有机框架材料的进一步发展。
